360 Anyone ever had their Tubi headers crack at the cylinder head?

You do not have a choice in the matter. JB Weld won't hold for ten seconds. That crack is probably the highest stress point for the header. Doing anything but the right thing---remove the header and weld it properly---would be silly.

 

My guess is the headers weren't decked properly and had uneven flanges.

 

Oof. That sucks. Sorry, Jeremy. Was hoping Tubi’s were more ‘immune’ to these stress failures than the OEM ones. How many miles on the headers?

 

I could fit my tig welder up in there and weld it. Not be perfect w/o removing but could work

 

I think the risk is that a bit of material could break off from the joint and bounce around inside the combustion chamber for a bit. That would like not end well.

 

I think he was referring to a cool spot on the head/exhaust valve area causing a problem.

I’d have the exhaust manifold removed and repaired the right way. If there’s any consolation, the exhaust studs and nuts look in good shape, and someone installed them with the proper copper exhaust nuts so removal should be easy.

Every time I’ve tried to halfass something, it’s bit me. That’s an expensive motor, don’t risk it.

 

JB Weld? Just do it right, please.

 

We used those on light aircraft engine exhaust. Iirc, they have a lock feature in the outer portion of them. I’d replace them. Soak everything in PBS Blaster for a day or two before you get started. Spray everything that’s going to be removed a couple times and let it soak.

 

I would call/email Tubi on this and send them pictures. They are the most expensive headers for Ferrari 360/F430 so I would imagine they should at least know about this ASAP.

 

I just looked on Amazon for you. They have those copper nuts and yes they have a lock feature in them. Type in Empi 9525 exhaust lock nut kit.

I not sure if those with match your threads, but they are still available.